Two 1.0 kg charges each carry a charge of 1.0 C? How would the gravitational force compare to the electric force? (Calculations are not necessary.)
1 answer
The gravitational force between two 1.0 kg charges would be negligible compared to the electric force. The electric force between two charges is proportional to the product of the charges and inversely proportional to the square of the distance between them. The gravitational force between two masses is proportional to the product of the masses and inversely proportional to the square of the distance between them. Since the electric force is much stronger than the gravitational force, the electric force between two 1.0 C charges would be much greater than the gravitational force between them.